High or low pressure metallic diaphragm attachment for governors.



v Patented Nov. I8, I902.

-H. F. SMITH. I HIGH UR LOW PRESSURE METALLIC DIAPHRAGM ATTACHMENT FOBGOVERNORS.

(Application filed June 21, 1902.)

2 Sheets-Sheet I.

(No Model.)

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HIGH 0R LOW PRESSUREMETITLLIG DIAPHRAGM ATTACHMENT FOR GOVERNORS)(Application filed. June 21, 1902. (NqModeL) 2 Sheets-8heet 2.

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HIGH OR LOW PRESSURE METALLIC DiAPHRAGM ATTACHMENT FOR GOVERNORS.

SPECIFICATION forming part of Letters Patent No. 714,048, dated November18, 1902. Application filed June 21,1902. Serial No. 112,567. (Nomodel.)

To all whom, it may concern:

Be it known that I, HARPER F. SMITH, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Improvement in High or Low PressureMetallic Diaphragm Attachments for Governors, of which the following isa specification.

My invention relates to an attachment for governors which can be used inconnection with any form of governors now in existence and is equallyapplicable to be used under the pressure of any hot or cold air, vapor,gas,

steam, or hot or cold liquids; and it consists of a series of ovalmetallic box-diaphragms' or diaphragm-chambers capable of acting unwhichare in communication with each other and are adapted to be adjusted by asuitable tension device, which can be manipulated on the exterior of thedevice.

It also consists of a novel constructionof oval metallicdiaphragm-chamber which is provided with an annular exterior groove orgrooves, which are located near the outer edges of the diaphragm,whereby the strain on the extreme ends of thediaphragm-plates isrelieved, thereby minimizing the liability of the same to crack.

It further consists of novel details of construction, all as will behereinafter fully set forth, and particularly pointed out in the claims.

Figure 1 represents a vertical sectional view of ahigh and low pressuremetallic diaphragm attachment for governors embodying my invention. Fig.2 represents a sectional view of one of the diaphragms' in detachedposition. Fig. 3 represents a plan view of Fig. 2. Fig. 4 represents avertical sectional view of another embodiment of my invention.

Similar numerals of reference indicate corresponding parts in thefigures.

Referring to the drawings, 1 designates my novel attachment forgovernors, the same consisting of the casing 2, having a base 3 formedon or seen red thereto in any suitable manner.

4 designates the inlet for the fluid or vapor, above which is locatedthe valve 5, which is adapted to contact with a seat 6, above which islocated the passage 7, from which leads 'the branch or outlet pipe 8.Above the passage 7 is located the chamber 9, into which is screwed orotherwise secured the depending .nipple 10, which opens into the lowerportion or bottom 11 of the diaphragm-chamber 12, the construction ofwhich will be readily understood from Figs. 1 and 2, said chamberconsisting of the lower portion 11 and the top or upper portion 13, eachof the latter being provided with the flanges l4 and 15, respectively,which are brazed orotherwise secured in any suitable manner, whereby atight or hermetical joint is formed.

16 designates an annular ridge which is located in the outer portion ofthe top 13 of the diaphragm-chamber, the under side 11 being providedwith a similar annular ridge 1?, whereby it Will be seen that the strainon the extreme ends of the upper and lower diaphragm-plates will berelieved while the device is in use, whereby the diaphragm-chamber willbe prevented from cracking and the life of the same prolonged.

18 designates a neck or nipple which forms a communication between theupper portion of the diaphragm-chamber l2 and the lower portion of thediaphragm-chamber 19, to the upper portion of which latter is securedthe neck or nipple 20, whereby communication is had with the uppermostdiaphragm-chamber 21, it being understood that the diaphragmchambers 19and 20 are similar in construction to the diaphragm-chamber 12, and itwill also be apparent that the number of the diaphragm -chambers may beincreased or diminished according to requirements, although 1 have shownin the present instance three of such diaphragm-chambers employed.

22 designates a rod or valve-stem which extends upwardly from the valve5 and is secured to a suitable portion of the tube-guide 23, which isbrazed or otherwise secured to the top of the diaphragm-chamber 21, sothat a tight or hermetical joint will be established.

24: designates a flange or shoulder on the tube-guide, upon which reststhe lower extremity of the spring 25, the upper extremity of said springbeing contained within the chamber 26 of the adj usting-cap 27, which isin threaded engagement with the top 28 of the casing 2 and which isadapted to be readily manipulated from the exterior of the casing,whereby the tension of the spring is regulated according torequirements.

29 designates a lock-nut or jam-nut which is adapted to lock theadjusting-cap in the desired position.

3O designates a guide-pin which may depend from or be attached to theadjusting cap in any suitable manner and whose lower end enters ortelescopes within the tube 31, which latter serves as a guide for thespring 25 and holds the latter in its proper position during theoperation of the governor.

It will thus be seen from the foregoing that when the spring 25 or itsequivalent tension deviceis set to the required pressure the pressureentering the inlet 4 is brought to bear internally against the upper andlower sides of each diaphragm or series of diaphragms, thereby expandingand contracting the internal space within the diaphragm-chambersaccording to the pressure exerted, on which the tension-spring would beset. For example, if the tension device 25 should be set at one poundany excess of pressure would expand the diaphragms until the valve 5 wasclosed or seated, and any decrease below that pres sure at which saidspring was set would immediately release or unseat said valve.

It will be apparent from the foregoing that the diaphragm or series ofdiaphragms can be Worked either singly or in series, as it may bedesirable to increase the movement of the Valve-rod, which movement canbe adjusted to any desired length, according to the number ofdiaphragm-chambers used. It will also be understood that theupperdiaphragmchamber is closed at its top and that the otherdiaphragm-chambers are connected at the center by a series of tubes,nipples, or necks, which are either brazed or otherwise tightly andsuitably joined, so as to prevent the escapement ot' the air, liquid,vapor, or whatever fluid-pressure medium may be employed. It will alsobe seen that the lower diaphragm-chamber on its lower side is connectedto the body of the governor by any suitable device, so that it remainsstationary and acts as a retention device when the tendency of thediaphragm chamber or chambers is to expand.

In Fig. 1 I have shown the valve 5 closed and the diaphragm-chambers allin an expanded state, therein showing the action of the diaphragm andthe position the valve assumes upon the very slightest excess of pressure beyond the amount set, it being seen that when the pressure isreleased under which the spring is set the diaphragms contract and thevalve reopens.

It will of course be understood by those skilled in this art that whenmy invention is used in connection with liquid-pressure said liquidenters beneath the valve 5, passes through the passage 7 and chamber 9t0 the interior of the diaphragm-chambers, whereby the pressure isexerted on the top and bottom ofsaid diaphragm-chambers, therebyexpanding them to the pressure set, said pressure being deliveredthrough the outlet 8 at any given pressure that may be desired.

In Fig. 4 I have shown but a single diaphragm-chamber as attached to thegoverning device patented to me in United States Letters Patent No.693,170, dated February 11, 1902, showing the application of myinvention to an air or vapor pressure, the diaphragm-chamber being showntherein in its normal or collapsed condition, the valve being opened.

It will be apparent that While I have described and prefer in practicethat my diaphragm-chamber should be composed of metal I do not desire tobe limited thereto, as it is obvious that the same may be composed ofother material without departing from the spirit of my invention. Itwill also be evident that the shape or the contour of thediaphragm-chambers may be changed from the forms shown without departingfrom the spirit of my invention.

In the construction seen in Fig. 4 I have shown another embodiment of myinvention wherein but a single diaphragm-chamber 12 is employed, thesame being contained within a casing 32, in the upper portion of whichis contained a spring 33, the tension of which can be varied by theadjustment of the cap 34, the above parts having substantially the samefunction as already described in Fig. 1. In the lower portion of thediaphragm-chamber seen in Fig. 4 are located the ports 35, whereby acommunication is had with the interior of said diaphragm-chamber and thetube or passage 36, which leads into the chamber 37, within which ispivotally mounted the lever 38, one end of said lever being pivotaliyattached to the rod 39, whose upper extremity is suitably secured tosaid diaphragm-chamber or its adjuncts, so that said rod anddiaphragm-chamber move in unison.

4O designates a valve-stem which depends from the valve 41, the lowerend of said valvestem being pivotally connected with an extremity of thelever 38, said valve being provided with the seat 42, above which islocated the inletpipe 44, the outlet-pipe 43 being in the presentinstance located below said Valveseat.

The device seen in Fig. 4is especially adapted for use in regulatingvapor, air, or similar fluid pressure, it being apparent that the fluidenters through the pipe 44 and thatthere is an accumulation thereofwithin the chamber 37 and that, futhermore, the pipe or passage 36 isfilled with a body of air which is interposed between the top of thefluid in the chamber 37 and the interior of the diaphragmchamber 12.

Ioo

By adjusting the tension device 33, as has been explained in detail withreference to Fig. 1, it will be apparent that said tension device can beadjusted to any desired pressure.

It will be apparent that the construction seen in Fig. 4 is equally welladapted for use with steam, gases, or other liquid or fluid pressure.

In lieu of the springs 25 to regulate and govern the diaphragm-chamber Imay employ a weight which may be superimposed upon the diaphragm, theoperation being similar in each case.

It will be apparent that while I have shown the preferred structure ofdevices in carrying out my invention I do not desire to be limitedthereto in every instance, as slight changes may be made by thoseskilled in the art which will come within the scope of my invention.

It is deemed important that the diaphragm be oval in cross-section-thatis, that the sides thereof be rounded or extended beyond parallel linesconnecting the outer edges of the diaphragm at the junction of saidedges and the ridges 16as I have found from experience that suchconstruction is essential in order that the diaphragms may respondproperly and promptly to the pressure, and where I refer in thefollowing claims to the diaphragms as being oval I wish to be understoodas referring to such formas just described in contradistinction to thatform in which the opposite sides of the diaphragm are parallel with eachother.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a diaphragm attachment for governors, a diaphragm-chamber composedof top and bottom portions having overlapping peripheral flanges,suitably joined together, said top and bottom portions being normallycurved outwardly and having an annular depression or groove at or nearthe outer portion thereof.

2. In a diaphragm attachment for governors, a casing, a passage leadingto the lower portion of said casing, a valve in said passage, the latterhaving a seat therefor, a valverod for said valve, oval metallicdiaphragmchambers in communication with said passage, means connectedwith said rod and acting against the upper surface of the upperdiaphragm-chamber, and a tension device acting on said means forregulating the pressure to be exercised upon said chambers.

3. In an attachment forgovernors,a casing, a passage leading to thelower portion of said casing, a valve in said passage, the latter havinga seat therefor, an outlet-passage above said valve-seat, a valve-rodfor said valve, an oval metallic diaphragm-chamber in communication withsaid outlet-passage, means supported on the upper surface of the upperwall of said diaphragm-chamber and connected with the valve-rod, aspring contained within said casing above said diaphragm-chamber andengaging said means,'and means for regulating the tension of saidspring.

4. In an attachment for governors, a plurality of oval metallicdiaphragm-chambers, the interior of each of said chambers being incommunication with each other, a support for said chambers, a valve-rodpassed through the communicating passages and connected within the upperchamber with means bearing on the upper surface of the upper portion ofthe latter, means for permitting the inlet of fluid-pressure and anoutlet for said fluidpressure whereby said chambers are caused to expandor contract according to requirements.

5. In an attachment for governors, a plurality of ovaldiaphragm-chambers, the interior of each of said chambers being incommunication with each other, a support for said chambers, means forvpermitting the inlet of fluid-pressure and an outlet for saidfluidpressure whereby said chambers are caused to expand or contractaccording to requirements,in combination with a valve-rod passed throughthe communicating passages, means holding the upper end of said rod andbearing upon the uppermost diaphragm-chamber, a spring bearing on thesaid holding means and acting on the upper surface of the uppermostchamber, a suitable tension device located in proximity to one of saiddiaphragmchambers and bearing on said means, and means for regulatingsaid tension device.

6. In an attachment for governors, oval diaphragm-chambers constructedand adapted to act in harmony to expand and contract in accord with apredetermined pressure, a valve controlling the supply to said chambers,a stem connected with said valve and passed through the passagesconnecting said chambers, means acting on the upper surface of theuppermost chamber, and a tension device connected with said stem andacting upon said connecting means.

7. In an attachment for governors, a series of oval diaphragm-chambers,tubular necks connecting the same at their centers whereby they allexpand in unison, a valve-stem depending from the top of the uppermostchamber, pressure-regulating means acting on the upper surface of theuppermost chamber,and a valve carried by the lower end of said stem,said stem being passed through said chambers and necks.

8. In an attachment forgovernors,the combination with a casing, of aseries of diaphragm-chambers therein, a tubular neck connecting thelowermost chamber with the base of the casing,necks connecting thechambers with each other, a tube-guide attached to the upper portion ofthe uppermost chamber, a valve-stem depending therefrom and extendedthrough said necks and chambers, a valve carried by the lower end ofsaid stem, a tube carried by said tube-guide, a spring around said tube,an adjusting-cap and a a tube carried by said tube-guide, a springaround said tube, an adjusting-cap, a guidepin carried thereby anddisposed within said spring, said cap having a chamber forming a guidefor the upper end of said spring, and a lock-nut for locking said cap inits adjusted position.

HARPER F. SMITH.

\Vituesses:

JOHN A. WIEDERSHEIM, (J. D. MCVAY.

